feat: add test for sender sends coin without batch_id

clients/apps/nodejs/test/tb04-simple-lightning-latch.mjs

@@ -414,5 +414,65 @@ describe('TB04 - Lightning Latch', function() {
         console.error('Error:', error);
         expect(error.message).to.include('failed');
       }
+    })
+  })
+
+  context('Statecoin sender sends coin without batch_id (receiver should still be able to receive, but no pre-image revealed)', () => {
+    it('should complete successfully', async () => {
+
+      // await removeDatabase();
+      const clientConfig = client_config.load();
+      let wallet_1_name = "w_ln_11";
+      let wallet_2_name = "w_ln_12";
+      await createWallet(clientConfig, wallet_1_name);
+      await createWallet(clientConfig, wallet_2_name);
+
+      const token = await mercurynodejslib.newToken(clientConfig, wallet_1_name);
+      const tokenId = token.token_id;
+
+      const amount = 10000;
+      const depositInfo = await mercurynodejslib.getDepositBitcoinAddress(clientConfig, wallet_1_name, amount);
+
+      const tokenList = await mercurynodejslib.getWalletTokens(clientConfig, wallet_1_name);
+      const usedToken = tokenList.find(token => token.token_id === tokenId);
+
+      expect(usedToken.spent).is.true;
+
+      await depositCoin(clientConfig, wallet_1_name, amount, depositInfo);
+
+      const listCoins = await mercurynodejslib.listStatecoins(clientConfig, wallet_1_name);
+
+      expect(listCoins.length).to.equal(1);
+
+      const coin = listCoins[0];
+
+      expect(coin.status).to.equal(CoinStatus.CONFIRMED);
+
+      const paymentHash = await mercurynodejslib.paymentHash(clientConfig, wallet_1_name, coin.statechain_id);
+
+      const transferAddress = await mercurynodejslib.newTransferAddress(clientConfig, wallet_2_name, null);
+
+      await mercurynodejslib.transferSend(clientConfig, wallet_1_name, coin.statechain_id, transferAddress.transfer_receive, false, null);
+
+      let transferReceiveResult = await mercurynodejslib.transferReceive(clientConfig, wallet_2_name);
+
+      expect(transferReceiveResult.isThereBatchLocked).is.true;
+      expect(transferReceiveResult.receivedStatechainIds).empty;
+
+      await mercurynodejslib.confirmPendingInvoice(clientConfig, wallet_1_name, coin.statechain_id);
+
+      transferReceiveResult = await mercurynodejslib.transferReceive(clientConfig, wallet_2_name);
+
+      expect(transferReceiveResult.isThereBatchLocked).is.false;
+      expect(transferReceiveResult.receivedStatechainIds).not.empty;
+
+      const { preimage } = await mercurynodejslib.retrievePreImage(clientConfig, wallet_1_name, coin.statechain_id, paymentHash.batchId);
+
+      const hash = crypto.createHash('sha256')
+          .update(Buffer.from(preimage, 'hex'))
+          .digest('hex')
+
+      expect(hash).to.equal(paymentHash.hash);
+    })
   })
 })